کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5506367 | 1400292 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Probing transport of charged β-lactamase inhibitors through OmpC, a membrane channel from E. coli
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
One of the major causes of antibiotic resistance in the Gram-negative bacteria is the low permeability across the outer membrane. Currently a main bottleneck in the development of effective antibiotics is the lack of a general method to quantify permeation which would allow screening for optimal scaffolds. Here, we present a permeation assay based on conventional electrophysiology. The method mainly involves application of concentration gradients of charged molecules with different electrophoretic mobilities through a membrane channel. Thus the unbalanced flux creates an electrostatic potential which provides direct information on relative ion fluxes. The experimental approach applied here involves measuring zero-current-potentials and the corresponding single channel conductance. For OmpC and the β-lactamase inhibitor avibactam at a 10 μm gradient the calculated flux rate at Vm=0mV was about n=200 molecules/s per OmpC single pore.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 484, Issue 1, 26 February 2017, Pages 51-55
Journal: Biochemical and Biophysical Research Communications - Volume 484, Issue 1, 26 February 2017, Pages 51-55
نویسندگان
Ishan Ghai, Mathias Winterhalter, Richard Wagner,